1321119990 has 32 divisors (see below), whose sum is σ = 3522987360. Its totient is φ = 352298592.

The previous prime is 1321119979. The next prime is 1321119991. The reversal of 1321119990 is 999111231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321119991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2446249 + ... + 2446788.

It is an arithmetic number, because the mean of its divisors is an integer number (110093355).

Almost surely, 2^1321119990 is an apocalyptic number.

1321119990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321119990 is an abundant number, since it is smaller than the sum of its proper divisors (2201867370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321119990 is a wasteful number, since it uses less digits than its factorization.

1321119990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4893053 (or 4893047 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 36.

The square root of 1321119990 is about 36347.2143361771. The cubic root of 1321119990 is about 1097.2714716951.

The spelling of 1321119990 in words is "one billion, three hundred twenty-one million, one hundred nineteen thousand, nine hundred ninety".